Lamp-tray.



J. E. JAMBOR.-

LAMP TRAY- APPLICATION FILED N01. 15. m6.

Pawnted Apr. 9, 1918.

mmmmwtmmmmmcmmm mmmmmmm mmmummm mm'mmmmmmmmn dmmntnmcmmmmmmmm i HVVE/VTUR AT TUFKNEYE' JOHN E. JAMBOR, OF MILWAUKEE; WISCONSIN.

LAMP-TRAY.

Specification of Letters Patent.

Patented Apr. 9, 1918.

Application filed November 15, 1916. Serial No. 131,471.*

To all whom it may concern:

Be it known that 1, JOHN E. JAMnoR, a citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and State of \Visconsin, have invented new and useful Improvements in Lamp-Trays, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

The invention relates to trays for use in the manufacture of incandescent or electric lamps.

1n the present construction of electric lamps during the process of securing the parts of the stem carrying the filaments and conductors together and for carrying the stems from one place to another during the process of manufacture it has been customary to provide a tray with wooden pegs for receiving the lower hollow end of the stem. These pegs are objectionable however because they shink and expand, and the stems vary in diameter, thus either loosely fitting the stems so that they fall and break through jarring in their movement from one place to another or breaking the stems due to the attempt to place them on the pegs when said pegs are in an enlarged and expanded condition or the stems are too small. To obviate these difliculties I have provided a simple and eflicient means for holding the stem in position on the tray to prevent loosenin falling and breaking of the stems caused Ey jarring when they are moved from one place to another and to eliminate cracking of the stems due to the small resistance offered in forcing them over these holders.

The invention further consists in the several features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings:

Figure 1 is a plan view of the device embodying the invention, parts being removed;

Fig. 2 is a section taken on the line 22 of Fig. 1;

Fig. 3 is a section taken on the line 3-3 of Fig. 1;

Fig. 4 is a section taken on the line 4-4 of Fig. 2.

In general the device comprises a support 5, and a plurality of stem holders 6 secured thereto.

The support 5 consists of a tray preferably of sheet metal having a marginal flanged edge 7 to elevate the main body of the tray above the supporting surface.

The lamp stems as usually constructed consist of a hollow conical base portion 8 of glass and an upright portion 9 of glass, these portions being annealed together to form the complete stem, the conductor wires 10 being secured in said stem.

The stem holders 6 each consists of a yielding strip of metal having a flat intermediate portion 11 and upwardly extending portions 12. These upright portions have fiat inwardly extending lower ends 13 and semi-cylindrical stem engaging portions 14: with curved upper ends 15. The holders being a resilient metal the upwardly extending portions 12 may be moved toward each other to form in effect a yielding peg, the stem engaging portions constantly bearing outwardly upon the base 8 of the stem inserted over them so that said stem cannot loosen from the peg while the tray is being carried from place to place and so that the stem will not be cracked when inserted over the ends of the peg. These pegs are each secured to the tray 5 by tongues 16 struck up from the fiat portion 11 and bent over to engage the tray adjacent apertures 17 therein.

The glass stems are inserted over the yielding pegs as shown and thus held in place while undergoing the different lamp making operations.

The invention thus exemplifies a simple and efiicient means for receiving and holding the stems carrying the lamp filaments and conductors.

W'hat I claim as my invention is:

1. As an article of manufacture a stem holder comprising a resilient metal plate having a base portion intermediate its ends and cotiperative yielding arms extending upwardly from the base, said arms having semi-cylindrical outer surfaces so that when moved together they form a cylindrical peg and said ends being semi-conical so that when moved toggther they form a conical upper end tor t peg.

2. A stem holder for filament stems comprising a support, a pair of resilient upright stem engaging members secured thereto, each member having a semi-cylindrical outer 5111 face for engaging the wall of the filament stem substantially throughout its length and so that when moved together said members form a split cylindrical neg upon which said stem is disposed and held without liability to breakage.

In testimony whereof, I aflix my signature.

JOHN E. JAMBOR.

copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. 0. 

